1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | /////////////////////////////////////////////////////////////////////////////// |
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27 | // |
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28 | // MODULE: G4SPSEneDistribution.cc |
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29 | // |
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30 | // Version: 1.0 |
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31 | // Date: 5/02/04 |
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32 | // Author: Fan Lei |
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33 | // Organisation: QinetiQ ltd. |
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34 | // Customer: ESA/ESTEC |
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35 | // |
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36 | /////////////////////////////////////////////////////////////////////////////// |
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37 | // |
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38 | // CHANGE HISTORY |
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39 | // -------------- |
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40 | // |
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41 | // |
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42 | // Version 1.0, 05/02/2004, Fan Lei, Created. |
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43 | // Based on the G4GeneralParticleSource class in Geant4 v6.0 |
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44 | // |
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45 | /////////////////////////////////////////////////////////////////////////////// |
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46 | // |
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47 | #include "Randomize.hh" |
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48 | //#include <cmath> |
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49 | |
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50 | #include "G4SPSEneDistribution.hh" |
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51 | |
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52 | G4SPSEneDistribution::G4SPSEneDistribution() |
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53 | { |
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54 | // |
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55 | // Initialise all variables |
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56 | particle_energy = 1.0*MeV; |
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57 | |
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58 | EnergyDisType = "Mono"; |
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59 | MonoEnergy = 1*MeV; |
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60 | Emin = 0.; |
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61 | Emax = 1.e30; |
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62 | alpha = 0.; |
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63 | Ezero = 0.; |
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64 | SE = 0.; |
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65 | Temp = 0.; |
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66 | grad = 0.; |
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67 | cept = 0.; |
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68 | EnergySpec = true; // true - energy spectra, false - momentum spectra |
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69 | DiffSpec = true; // true - differential spec, false integral spec |
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70 | IntType = "NULL"; // Interpolation type |
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71 | IPDFEnergyExist = false; |
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72 | IPDFArbExist = false; |
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73 | |
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74 | ArbEmin = 0.; |
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75 | ArbEmax = 1.e30; |
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76 | |
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77 | verbosityLevel = 0 ; |
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78 | |
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79 | } |
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80 | |
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81 | G4SPSEneDistribution::~G4SPSEneDistribution() |
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82 | {} |
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83 | |
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84 | void G4SPSEneDistribution::SetEnergyDisType(G4String DisType) |
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85 | { |
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86 | EnergyDisType = DisType; |
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87 | if (EnergyDisType == "User"){ |
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88 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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89 | IPDFEnergyExist = false ; |
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90 | } else if ( EnergyDisType == "Arb"){ |
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91 | ArbEnergyH =IPDFArbEnergyH = ZeroPhysVector ; |
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92 | IPDFArbExist = false; |
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93 | } else if (EnergyDisType == "Epn"){ |
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94 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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95 | IPDFEnergyExist = false ; |
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96 | EpnEnergyH = ZeroPhysVector ; |
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97 | } |
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98 | } |
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99 | |
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100 | void G4SPSEneDistribution::SetEmin(G4double emi) |
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101 | { |
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102 | Emin = emi; |
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103 | } |
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104 | |
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105 | void G4SPSEneDistribution::SetEmax(G4double ema) |
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106 | { |
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107 | Emax = ema; |
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108 | } |
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109 | |
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110 | void G4SPSEneDistribution::SetMonoEnergy(G4double menergy) |
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111 | { |
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112 | MonoEnergy = menergy; |
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113 | } |
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114 | |
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115 | void G4SPSEneDistribution::SetBeamSigmaInE(G4double e) |
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116 | { |
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117 | SE = e; |
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118 | } |
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119 | void G4SPSEneDistribution::SetAlpha(G4double alp) |
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120 | { |
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121 | alpha = alp; |
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122 | } |
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123 | |
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124 | void G4SPSEneDistribution::SetTemp(G4double tem) |
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125 | { |
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126 | Temp = tem; |
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127 | } |
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128 | |
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129 | void G4SPSEneDistribution::SetEzero(G4double eze) |
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130 | { |
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131 | Ezero = eze; |
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132 | } |
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133 | |
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134 | void G4SPSEneDistribution::SetGradient(G4double gr) |
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135 | { |
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136 | grad = gr; |
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137 | } |
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138 | |
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139 | void G4SPSEneDistribution::SetInterCept(G4double c) |
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140 | { |
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141 | cept = c; |
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142 | } |
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143 | |
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144 | void G4SPSEneDistribution::UserEnergyHisto(G4ThreeVector input) |
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145 | { |
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146 | G4double ehi, val; |
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147 | ehi = input.x(); |
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148 | val = input.y(); |
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149 | if(verbosityLevel > 1) { |
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150 | G4cout << "In UserEnergyHisto" << G4endl; |
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151 | G4cout << " " << ehi << " " << val << G4endl; |
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152 | } |
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153 | UDefEnergyH.InsertValues(ehi, val); |
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154 | Emax = ehi; |
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155 | } |
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156 | |
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157 | void G4SPSEneDistribution::ArbEnergyHisto(G4ThreeVector input) |
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158 | { |
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159 | G4double ehi, val; |
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160 | ehi = input.x(); |
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161 | val = input.y(); |
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162 | if(verbosityLevel >1 ) { |
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163 | G4cout << "In ArbEnergyHisto" << G4endl; |
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164 | G4cout << " " << ehi << " " << val << G4endl; |
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165 | } |
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166 | ArbEnergyH.InsertValues(ehi, val); |
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167 | } |
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168 | |
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169 | void G4SPSEneDistribution::EpnEnergyHisto(G4ThreeVector input) |
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170 | { |
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171 | G4double ehi, val; |
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172 | ehi = input.x(); |
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173 | val = input.y(); |
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174 | if(verbosityLevel > 1) { |
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175 | G4cout << "In EpnEnergyHisto" << G4endl; |
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176 | G4cout << " " << ehi << " " << val << G4endl; |
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177 | } |
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178 | EpnEnergyH.InsertValues(ehi, val); |
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179 | Emax = ehi; |
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180 | Epnflag = true; |
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181 | } |
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182 | |
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183 | void G4SPSEneDistribution::Calculate() |
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184 | { |
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185 | if(EnergyDisType == "Cdg") |
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186 | CalculateCdgSpectrum(); |
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187 | else if(EnergyDisType == "Bbody") |
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188 | CalculateBbodySpectrum(); |
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189 | } |
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190 | |
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191 | void G4SPSEneDistribution::CalculateCdgSpectrum() |
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192 | { |
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193 | // This uses the spectrum from The INTEGRAL Mass Model (TIMM) |
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194 | // to generate a Cosmic Diffuse X/gamma ray spectrum. |
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195 | G4double pfact[2] = {8.5, 112}; |
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196 | G4double spind[2] = {1.4, 2.3}; |
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197 | G4double ene_line[3] = {1.*keV, 18.*keV, 1E6*keV}; |
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198 | G4int n_par; |
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199 | |
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200 | ene_line[0] = Emin; |
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201 | if(Emin < 18*keV) |
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202 | { |
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203 | n_par = 2; |
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204 | ene_line[2] = Emax; |
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205 | if(Emax < 18*keV) |
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206 | { |
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207 | n_par = 1; |
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208 | ene_line[1] = Emax; |
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209 | } |
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210 | } |
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211 | else |
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212 | { |
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213 | n_par = 1; |
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214 | pfact[0] = 112.; |
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215 | spind[0] = 2.3; |
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216 | ene_line[1] = Emax; |
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217 | } |
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218 | |
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219 | // Create a cumulative histogram. |
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220 | CDGhist[0] = 0.; |
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221 | G4double omalpha; |
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222 | G4int i = 0; |
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223 | |
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224 | while(i < n_par) |
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225 | { |
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226 | omalpha = 1. - spind[i]; |
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227 | CDGhist[i+1] = CDGhist[i] + (pfact[i]/omalpha)* |
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228 | (std::pow(ene_line[i+1]/keV,omalpha)-std::pow(ene_line[i]/keV,omalpha)); |
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229 | i++; |
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230 | } |
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231 | |
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232 | // Normalise histo and divide by 1000 to make MeV. |
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233 | i = 0; |
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234 | while(i < n_par) |
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235 | { |
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236 | CDGhist[i+1] = CDGhist[i+1]/CDGhist[n_par]; |
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237 | // G4cout << CDGhist[i] << CDGhist[n_par] << G4endl; |
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238 | i++; |
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239 | } |
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240 | } |
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241 | |
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242 | void G4SPSEneDistribution::CalculateBbodySpectrum() |
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243 | { |
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244 | // create bbody spectrum |
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245 | // Proved very hard to integrate indefinitely, so different |
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246 | // method. User inputs emin, emax and T. These are used to |
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247 | // create a 10,000 bin histogram. |
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248 | // Use photon density spectrum = 2 nu**2/c**2 * (std::exp(h nu/kT)-1) |
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249 | // = 2 E**2/h**2c**2 times the exponential |
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250 | G4double erange = Emax - Emin; |
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251 | G4double steps = erange/10000.; |
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252 | G4double Bbody_y[10000]; |
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253 | G4double k = 8.6181e-11; //Boltzmann const in MeV/K |
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254 | G4double h = 4.1362e-21; // Plancks const in MeV s |
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255 | G4double c = 3e8; // Speed of light |
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256 | G4double h2 = h*h; |
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257 | G4double c2 = c*c; |
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258 | G4int count = 0; |
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259 | G4double sum = 0.; |
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260 | BBHist[0] = 0.; |
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261 | while(count < 10000) |
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262 | { |
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263 | Bbody_x[count] = Emin + G4double(count*steps); |
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264 | Bbody_y[count] = (2.*std::pow(Bbody_x[count],2.))/ |
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265 | (h2*c2*(std::exp(Bbody_x[count]/(k*Temp)) - 1.)); |
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266 | sum = sum + Bbody_y[count]; |
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267 | BBHist[count+1] = BBHist[count] + Bbody_y[count]; |
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268 | count++; |
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269 | } |
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270 | |
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271 | Bbody_x[10000] = Emax; |
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272 | // Normalise cumulative histo. |
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273 | count = 0; |
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274 | while(count<10001) |
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275 | { |
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276 | BBHist[count] = BBHist[count]/sum; |
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277 | count++; |
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278 | } |
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279 | } |
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280 | |
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281 | void G4SPSEneDistribution::InputEnergySpectra(G4bool value) |
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282 | { |
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283 | // Allows user to specifiy spectrum is momentum |
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284 | EnergySpec = value; // false if momentum |
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285 | if(verbosityLevel > 1) |
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286 | G4cout << "EnergySpec has value " << EnergySpec << G4endl; |
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287 | } |
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288 | |
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289 | void G4SPSEneDistribution::InputDifferentialSpectra(G4bool value) |
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290 | { |
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291 | // Allows user to specify integral or differential spectra |
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292 | DiffSpec = value; // true = differential, false = integral |
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293 | if(verbosityLevel > 1) |
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294 | G4cout << "Diffspec has value " << DiffSpec << G4endl; |
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295 | } |
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296 | |
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297 | void G4SPSEneDistribution::ArbInterpolate(G4String IType) |
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298 | { |
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299 | if(EnergyDisType != "Arb") |
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300 | G4cout << "Error: this is for arbitrary distributions" << G4endl; |
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301 | IntType = IType; |
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302 | ArbEmax = Emax; |
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303 | ArbEmin = Emin; |
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304 | |
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305 | // Now interpolate points |
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306 | if(IntType == "Lin") |
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307 | LinearInterpolation(); |
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308 | if(IntType == "Log") |
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309 | LogInterpolation(); |
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310 | if(IntType == "Exp") |
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311 | ExpInterpolation(); |
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312 | if(IntType == "Spline") |
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313 | SplineInterpolation(); |
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314 | } |
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315 | |
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316 | void G4SPSEneDistribution::LinearInterpolation() |
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317 | { |
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318 | // Method to do linear interpolation on the Arb points |
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319 | // Calculate equation of each line segment, max 1024. |
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320 | // Calculate Area under each segment |
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321 | // Create a cumulative array which is then normalised Arb_Cum_Area |
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322 | |
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323 | G4double Area_seg[1024]; // Stores area under each segment |
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324 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
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325 | G4int i, count; |
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326 | G4int maxi = ArbEnergyH.GetVectorLength(); |
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327 | for(i=0;i<maxi;i++) { |
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328 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
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329 | Arb_y[i] = ArbEnergyH(size_t(i)); |
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330 | } |
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331 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
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332 | // made differential and if momentum it has to be made energy. |
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333 | if(DiffSpec == false) { |
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334 | // Converts integral point-wise spectra to Differential |
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335 | for( count=0;count < maxi-1;count++) { |
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336 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
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337 | } |
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338 | maxi--; |
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339 | } |
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340 | // |
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341 | if(EnergySpec == false) { |
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342 | // change currently stored values (emin etc) which are actually momenta |
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343 | // to energies. |
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344 | if(particle_definition == NULL) |
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345 | G4cout << "Error: particle not defined" << G4endl; |
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346 | else { |
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347 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
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348 | // p should be entered as E/c i.e. without the division by c |
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349 | // being done - energy equivalent. |
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350 | G4double mass = particle_definition->GetPDGMass(); |
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351 | // convert point to energy unit and its value to per energy unit |
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352 | G4double total_energy; |
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353 | for(count=0;count<maxi;count++) { |
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354 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
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355 | + (mass*mass)); // total energy |
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356 | |
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357 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
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358 | Arb_x[count] = total_energy - mass ; // kinetic energy |
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359 | } |
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360 | } |
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361 | } |
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362 | // |
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363 | i=1; |
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364 | Arb_grad[0] = 0.; |
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365 | Arb_cept[0] = 0.; |
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366 | Area_seg[0] = 0.; |
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367 | Arb_Cum_Area[0] = 0.; |
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368 | while(i < maxi) |
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369 | { |
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370 | // calc gradient and intercept for each segment |
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371 | Arb_grad[i] = (Arb_y[i] - Arb_y[i-1]) / (Arb_x[i] - Arb_x[i-1]); |
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372 | if(verbosityLevel == 2) |
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373 | G4cout << Arb_grad[i] << G4endl; |
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374 | if(Arb_grad[i] > 0.) |
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375 | { |
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376 | if(verbosityLevel == 2) |
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377 | G4cout << "Arb_grad is positive" << G4endl; |
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378 | Arb_cept[i] = Arb_y[i] - (Arb_grad[i] * Arb_x[i]); |
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379 | } |
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380 | else if(Arb_grad[i] < 0.) |
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381 | { |
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382 | if(verbosityLevel == 2) |
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383 | G4cout << "Arb_grad is negative" << G4endl; |
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384 | Arb_cept[i] = Arb_y[i] + (-Arb_grad[i] * Arb_x[i]); |
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385 | } |
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386 | else |
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387 | { |
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388 | if(verbosityLevel == 2) |
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389 | G4cout << "Arb_grad is 0." << G4endl; |
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390 | Arb_cept[i] = Arb_y[i]; |
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391 | } |
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392 | |
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393 | Area_seg[i] = ((Arb_grad[i]/2)*(Arb_x[i]*Arb_x[i] - Arb_x[i-1]*Arb_x[i-1]) + Arb_cept[i]*(Arb_x[i] - Arb_x[i-1])); |
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394 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
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395 | sum = sum + Area_seg[i]; |
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396 | if(verbosityLevel == 2) |
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397 | G4cout << Arb_x[i] << Arb_y[i] << Area_seg[i] << sum << Arb_grad[i] << G4endl; |
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398 | i++; |
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399 | } |
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400 | |
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401 | i=0; |
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402 | while(i < maxi) |
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403 | { |
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404 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; // normalisation |
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405 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
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406 | i++; |
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407 | } |
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408 | |
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409 | if(verbosityLevel >= 1) |
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410 | { |
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411 | G4cout << "Leaving LinearInterpolation" << G4endl; |
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412 | ArbEnergyH.DumpValues(); |
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413 | IPDFArbEnergyH.DumpValues(); |
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414 | } |
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415 | } |
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416 | |
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417 | void G4SPSEneDistribution::LogInterpolation() |
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418 | { |
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419 | // Interpolation based on Logarithmic equations |
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420 | // Generate equations of line segments |
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421 | // y = Ax**alpha => log y = alpha*logx + logA |
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422 | // Find area under line segments |
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423 | // create normalised, cumulative array Arb_Cum_Area |
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424 | G4double Area_seg[1024]; // Stores area under each segment |
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425 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
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426 | G4int i, count; |
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427 | G4int maxi = ArbEnergyH.GetVectorLength(); |
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428 | for(i=0;i<maxi;i++) { |
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429 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
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430 | Arb_y[i] = ArbEnergyH(size_t(i)); |
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431 | } |
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432 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
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433 | // made differential and if momentum it has to be made energy. |
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434 | if(DiffSpec == false) { |
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435 | // Converts integral point-wise spectra to Differential |
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436 | for( count=0;count<maxi-1;count++) { |
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437 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
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438 | } |
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439 | maxi--; |
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440 | } |
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441 | // |
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442 | if(EnergySpec == false) { |
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443 | // change currently stored values (emin etc) which are actually momenta |
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444 | // to energies. |
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445 | if(particle_definition == NULL) |
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446 | G4cout << "Error: particle not defined" << G4endl; |
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447 | else { |
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448 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
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449 | // p should be entered as E/c i.e. without the division by c |
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450 | // being done - energy equivalent. |
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451 | G4double mass = particle_definition->GetPDGMass(); |
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452 | // convert point to energy unit and its value to per energy unit |
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453 | G4double total_energy; |
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454 | for(count=0;count<maxi;count++) { |
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455 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
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456 | + (mass*mass)); // total energy |
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457 | |
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458 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
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459 | Arb_x[count] = total_energy - mass ; // kinetic energy |
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460 | } |
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461 | } |
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462 | } |
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463 | // |
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464 | i=1; |
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465 | Arb_alpha[0] = 0.; |
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466 | Arb_Const[0] = 0.; |
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467 | Area_seg[0] = 0.; |
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468 | Arb_Cum_Area[0]=0. ; |
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469 | if(Arb_x[0] <= 0. || Arb_y[0] <= 0.) |
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470 | { |
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471 | G4cout << "You should not use log interpolation with points <= 0." << G4endl; |
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472 | G4cout << "These will be changed to 1e-20, which may cause problems" << G4endl; |
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473 | if(Arb_x[0] <= 0.) |
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474 | Arb_x[0] = 1e-20; |
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475 | if(Arb_y[0] <= 0.) |
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476 | Arb_y[0] = 1e-20; |
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477 | } |
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478 | |
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479 | G4double alp; |
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480 | while(i <maxi) |
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481 | { |
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482 | // Incase points are negative or zero |
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483 | if(Arb_x[i] <= 0. || Arb_y[i] <= 0.) |
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484 | { |
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485 | G4cout << "You should not use log interpolation with points <= 0." << G4endl; |
---|
486 | G4cout << "These will be changed to 1e-20, which may cause problems" << G4endl; |
---|
487 | if(Arb_x[i] <= 0.) |
---|
488 | Arb_x[i] = 1e-20; |
---|
489 | if(Arb_y[i] <= 0.) |
---|
490 | Arb_y[i] = 1e-20; |
---|
491 | } |
---|
492 | |
---|
493 | Arb_alpha[i] = (std::log10(Arb_y[i])-std::log10(Arb_y[i-1]))/(std::log10(Arb_x[i])-std::log10(Arb_x[i-1])); |
---|
494 | Arb_Const[i] = Arb_y[i]/(std::pow(Arb_x[i],Arb_alpha[i])); |
---|
495 | alp = Arb_alpha[i] + 1; |
---|
496 | Area_seg[i] = (Arb_Const[i]/alp) * (std::pow(Arb_x[i],alp) - std::pow(Arb_x[i-1],alp)); |
---|
497 | sum = sum + Area_seg[i]; |
---|
498 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
---|
499 | if(verbosityLevel == 2) |
---|
500 | G4cout << Arb_alpha[i] << Arb_Const[i] << Area_seg[i] << G4endl; |
---|
501 | i++; |
---|
502 | } |
---|
503 | |
---|
504 | i=0; |
---|
505 | while(i<maxi) |
---|
506 | { |
---|
507 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; |
---|
508 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
---|
509 | i++; |
---|
510 | } |
---|
511 | if(verbosityLevel >= 1) |
---|
512 | G4cout << "Leaving LogInterpolation " << G4endl; |
---|
513 | } |
---|
514 | |
---|
515 | void G4SPSEneDistribution::ExpInterpolation() |
---|
516 | { |
---|
517 | // Interpolation based on Exponential equations |
---|
518 | // Generate equations of line segments |
---|
519 | // y = Ae**-(x/e0) => ln y = -x/e0 + lnA |
---|
520 | // Find area under line segments |
---|
521 | // create normalised, cumulative array Arb_Cum_Area |
---|
522 | G4double Area_seg[1024]; // Stores area under each segment |
---|
523 | G4double sum = 0., Arb_x[1024], Arb_y[1024], Arb_Cum_Area[1024]; |
---|
524 | G4int i, count; |
---|
525 | G4int maxi = ArbEnergyH.GetVectorLength(); |
---|
526 | for(i=0;i<maxi;i++) { |
---|
527 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
---|
528 | Arb_y[i] = ArbEnergyH(size_t(i)); |
---|
529 | } |
---|
530 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
---|
531 | // made differential and if momentum it has to be made energy. |
---|
532 | if(DiffSpec == false) { |
---|
533 | // Converts integral point-wise spectra to Differential |
---|
534 | for( count=0;count< maxi-1;count++) { |
---|
535 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
---|
536 | } |
---|
537 | maxi--; |
---|
538 | } |
---|
539 | // |
---|
540 | if(EnergySpec == false) { |
---|
541 | // change currently stored values (emin etc) which are actually momenta |
---|
542 | // to energies. |
---|
543 | if(particle_definition == NULL) |
---|
544 | G4cout << "Error: particle not defined" << G4endl; |
---|
545 | else { |
---|
546 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
---|
547 | // p should be entered as E/c i.e. without the division by c |
---|
548 | // being done - energy equivalent. |
---|
549 | G4double mass = particle_definition->GetPDGMass(); |
---|
550 | // convert point to energy unit and its value to per energy unit |
---|
551 | G4double total_energy; |
---|
552 | for(count=0;count<maxi;count++) { |
---|
553 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
---|
554 | + (mass*mass)); // total energy |
---|
555 | |
---|
556 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
---|
557 | Arb_x[count] = total_energy - mass ; // kinetic energy |
---|
558 | } |
---|
559 | } |
---|
560 | } |
---|
561 | // |
---|
562 | i=1; |
---|
563 | Arb_ezero[0] = 0.; |
---|
564 | Arb_Const[0] = 0.; |
---|
565 | Area_seg[0] = 0.; |
---|
566 | Arb_Cum_Area[0] = 0.; |
---|
567 | while(i < maxi) |
---|
568 | { |
---|
569 | G4double test = std::log(Arb_y[i]) - std::log(Arb_y[i-1]); |
---|
570 | if(test > 0. || test < 0.) |
---|
571 | { |
---|
572 | Arb_ezero[i] = -(Arb_x[i] - Arb_x[i-1])/(std::log(Arb_y[i]) - std::log(Arb_y[i-1])); |
---|
573 | Arb_Const[i] = Arb_y[i]/(std::exp(-Arb_x[i]/Arb_ezero[i])); |
---|
574 | Area_seg[i]=-(Arb_Const[i]*Arb_ezero[i])*(std::exp(-Arb_x[i]/Arb_ezero[i]) |
---|
575 | -std::exp(-Arb_x[i-1]/Arb_ezero[i])); |
---|
576 | } |
---|
577 | else |
---|
578 | { |
---|
579 | G4cout << "Flat line segment: problem" << G4endl; |
---|
580 | Arb_ezero[i] = 0.; |
---|
581 | Arb_Const[i] = 0.; |
---|
582 | Area_seg[i] = 0.; |
---|
583 | } |
---|
584 | sum = sum + Area_seg[i]; |
---|
585 | Arb_Cum_Area[i] = Arb_Cum_Area[i-1] + Area_seg[i]; |
---|
586 | if(verbosityLevel == 2) |
---|
587 | G4cout << Arb_ezero[i] << Arb_Const[i] << Area_seg[i] << G4endl; |
---|
588 | i++; |
---|
589 | } |
---|
590 | |
---|
591 | i=0; |
---|
592 | while(i<maxi) |
---|
593 | { |
---|
594 | Arb_Cum_Area[i] = Arb_Cum_Area[i]/sum; |
---|
595 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_Cum_Area[i]); |
---|
596 | i++; |
---|
597 | } |
---|
598 | if(verbosityLevel >= 1) |
---|
599 | G4cout << "Leaving ExpInterpolation " << G4endl; |
---|
600 | } |
---|
601 | |
---|
602 | void G4SPSEneDistribution::SplineInterpolation() |
---|
603 | { |
---|
604 | // Interpolation using Splines. |
---|
605 | // Create Normalised arrays, make x 0->1 and y hold |
---|
606 | // the function (Energy) |
---|
607 | G4double Arb_x[1024], Arb_y[1024]; |
---|
608 | G4int i, count; |
---|
609 | G4int maxi = ArbEnergyH.GetVectorLength(); |
---|
610 | for(i=0;i<maxi;i++) { |
---|
611 | Arb_x[i] = ArbEnergyH.GetLowEdgeEnergy(size_t(i)); |
---|
612 | Arb_y[i] = ArbEnergyH(size_t(i)); |
---|
613 | } |
---|
614 | // Points are now in x,y arrays. If the spectrum is integral it has to be |
---|
615 | // made differential and if momentum it has to be made energy. |
---|
616 | if(DiffSpec == false) { |
---|
617 | // Converts integral point-wise spectra to Differential |
---|
618 | for( count=0;count< maxi-1;count++) { |
---|
619 | Arb_y[count] = (Arb_y[count] - Arb_y[count+1])/(Arb_x[count+1]-Arb_x[count]); |
---|
620 | } |
---|
621 | maxi--; |
---|
622 | } |
---|
623 | // |
---|
624 | if(EnergySpec == false) { |
---|
625 | // change currently stored values (emin etc) which are actually momenta |
---|
626 | // to energies. |
---|
627 | if(particle_definition == NULL) |
---|
628 | G4cout << "Error: particle not defined" << G4endl; |
---|
629 | else { |
---|
630 | // Apply Energy**2 = p**2c**2 + m0**2c**4 |
---|
631 | // p should be entered as E/c i.e. without the division by c |
---|
632 | // being done - energy equivalent. |
---|
633 | G4double mass = particle_definition->GetPDGMass(); |
---|
634 | // convert point to energy unit and its value to per energy unit |
---|
635 | G4double total_energy; |
---|
636 | for(count=0;count<maxi;count++) { |
---|
637 | total_energy = std::sqrt((Arb_x[count]*Arb_x[count]) |
---|
638 | + (mass*mass)); // total energy |
---|
639 | |
---|
640 | Arb_y[count] = Arb_y[count] * Arb_x[count]/total_energy; |
---|
641 | Arb_x[count] = total_energy - mass ; // kinetic energy |
---|
642 | } |
---|
643 | } |
---|
644 | } |
---|
645 | // |
---|
646 | for(i=1;i<maxi;i++) |
---|
647 | Arb_y[i] += Arb_y[i-1]; |
---|
648 | |
---|
649 | for(i=0;i<maxi;i++) |
---|
650 | Arb_y[i] /= Arb_y[maxi-1]; |
---|
651 | // now Arb_y is accumulated normalised probabilities |
---|
652 | /* for(i=0; i<maxi;i++) { |
---|
653 | if(verbosityLevel >1) |
---|
654 | G4cout << i <<" "<< Arb_x[i] << " " << Arb_y[i] << G4endl; |
---|
655 | IPDFArbEnergyH.InsertValues(Arb_x[i], Arb_y[i]); |
---|
656 | } |
---|
657 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(IPDFArbEnergyH.GetVectorLength()-1); |
---|
658 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(0); |
---|
659 | */ |
---|
660 | // Should now have normalised cumulative probabilities in Arb_y |
---|
661 | // and energy values in Arb_x. |
---|
662 | // maxi = maxi + 1; |
---|
663 | // Put y into x and x into y. The spline interpolation will then |
---|
664 | // go through x-axis to find where to interpolate (cum probability) |
---|
665 | // then generate a y (which will now be energy). |
---|
666 | SplineInt = new G4DataInterpolation(Arb_y,Arb_x,maxi,1e30,1e30); |
---|
667 | if(verbosityLevel >1 ) |
---|
668 | { |
---|
669 | G4cout << SplineInt << G4endl; |
---|
670 | G4cout << SplineInt->LocateArgument(1.0) << G4endl; |
---|
671 | } |
---|
672 | if(verbosityLevel > 0 ) |
---|
673 | G4cout << "Leaving SplineInterpolation " << G4endl; |
---|
674 | } |
---|
675 | |
---|
676 | void G4SPSEneDistribution::GenerateMonoEnergetic() |
---|
677 | { |
---|
678 | // Method to generate MonoEnergetic particles. |
---|
679 | particle_energy = MonoEnergy; |
---|
680 | } |
---|
681 | |
---|
682 | void G4SPSEneDistribution::GenerateGaussEnergies() |
---|
683 | { |
---|
684 | // Method to generate Gaussian particles. |
---|
685 | particle_energy = G4RandGauss::shoot(MonoEnergy,SE); |
---|
686 | if (particle_energy < 0) particle_energy = 0.; |
---|
687 | } |
---|
688 | |
---|
689 | void G4SPSEneDistribution::GenerateLinearEnergies(G4bool bArb = false) |
---|
690 | { |
---|
691 | G4double rndm; |
---|
692 | G4double emaxsq = std::pow(Emax,2.); //Emax squared |
---|
693 | G4double eminsq = std::pow(Emin,2.); //Emin squared |
---|
694 | G4double intersq = std::pow(cept,2.); //cept squared |
---|
695 | |
---|
696 | if (bArb) rndm = G4UniformRand(); |
---|
697 | else rndm = eneRndm->GenRandEnergy(); |
---|
698 | |
---|
699 | G4double bracket = ((grad/2.)*(emaxsq - eminsq) + cept*(Emax-Emin)); |
---|
700 | bracket = bracket * rndm; |
---|
701 | bracket = bracket + (grad/2.)*eminsq + cept*Emin; |
---|
702 | // Now have a quad of form m/2 E**2 + cE - bracket = 0 |
---|
703 | bracket = -bracket; |
---|
704 | // G4cout << "BRACKET" << bracket << G4endl; |
---|
705 | if(grad != 0.) |
---|
706 | { |
---|
707 | G4double sqbrack = (intersq - 4*(grad/2.)*(bracket)); |
---|
708 | // G4cout << "SQBRACK" << sqbrack << G4endl; |
---|
709 | sqbrack = std::sqrt(sqbrack); |
---|
710 | G4double root1 = -cept + sqbrack; |
---|
711 | root1 = root1/(2.*(grad/2.)); |
---|
712 | |
---|
713 | G4double root2 = -cept - sqbrack; |
---|
714 | root2 = root2/(2.*(grad/2.)); |
---|
715 | |
---|
716 | // G4cout << root1 << " roots " << root2 << G4endl; |
---|
717 | |
---|
718 | if(root1 > Emin && root1 < Emax) |
---|
719 | particle_energy = root1; |
---|
720 | if(root2 > Emin && root2 < Emax) |
---|
721 | particle_energy = root2; |
---|
722 | } |
---|
723 | else if(grad == 0.) |
---|
724 | // have equation of form cE - bracket =0 |
---|
725 | particle_energy = bracket/cept; |
---|
726 | |
---|
727 | if(particle_energy < 0.) |
---|
728 | particle_energy = -particle_energy; |
---|
729 | |
---|
730 | if(verbosityLevel >= 1) |
---|
731 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
732 | } |
---|
733 | |
---|
734 | void G4SPSEneDistribution::GeneratePowEnergies(G4bool bArb = false) |
---|
735 | { |
---|
736 | // Method to generate particle energies distributed as |
---|
737 | // a powerlaw |
---|
738 | |
---|
739 | G4double rndm; |
---|
740 | G4double emina, emaxa; |
---|
741 | |
---|
742 | emina = std::pow(Emin,alpha+1); |
---|
743 | emaxa = std::pow(Emax,alpha+1); |
---|
744 | |
---|
745 | if (bArb) rndm = G4UniformRand(); |
---|
746 | else rndm = eneRndm->GenRandEnergy(); |
---|
747 | |
---|
748 | if(alpha != -1.) |
---|
749 | { |
---|
750 | particle_energy = ((rndm*(emaxa - emina)) + emina); |
---|
751 | particle_energy = std::pow(particle_energy,(1./(alpha+1.))); |
---|
752 | } |
---|
753 | else if(alpha == -1.) |
---|
754 | { |
---|
755 | particle_energy = (std::log(Emin) + rndm*(std::log(Emax) - std::log(Emin))); |
---|
756 | particle_energy = std::exp(particle_energy); |
---|
757 | } |
---|
758 | if(verbosityLevel >= 1) |
---|
759 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
760 | } |
---|
761 | |
---|
762 | void G4SPSEneDistribution::GenerateExpEnergies(G4bool bArb = false) |
---|
763 | { |
---|
764 | // Method to generate particle energies distributed according |
---|
765 | // to an exponential curve. |
---|
766 | G4double rndm; |
---|
767 | |
---|
768 | if (bArb) rndm = G4UniformRand(); |
---|
769 | else rndm = eneRndm->GenRandEnergy(); |
---|
770 | |
---|
771 | particle_energy = -Ezero*(std::log(rndm*(std::exp(-Emax/Ezero) - std::exp(-Emin/Ezero)) + |
---|
772 | std::exp(-Emin/Ezero))); |
---|
773 | if(verbosityLevel >= 1) |
---|
774 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
775 | } |
---|
776 | |
---|
777 | void G4SPSEneDistribution::GenerateBremEnergies() |
---|
778 | { |
---|
779 | // Method to generate particle energies distributed according |
---|
780 | // to a Bremstrahlung equation of |
---|
781 | // form I = const*((kT)**1/2)*E*(e**(-E/kT)) |
---|
782 | |
---|
783 | G4double rndm; |
---|
784 | rndm = eneRndm->GenRandEnergy(); |
---|
785 | G4double expmax, expmin, k; |
---|
786 | |
---|
787 | k = 8.6181e-11; // Boltzmann's const in MeV/K |
---|
788 | G4double ksq = std::pow(k,2.); // k squared |
---|
789 | G4double Tsq = std::pow(Temp,2.); // Temp squared |
---|
790 | |
---|
791 | expmax = std::exp(-Emax/(k*Temp)); |
---|
792 | expmin = std::exp(-Emin/(k*Temp)); |
---|
793 | |
---|
794 | // If either expmax or expmin are zero then this will cause problems |
---|
795 | // Most probably this will be because T is too low or E is too high |
---|
796 | |
---|
797 | if(expmax == 0.) |
---|
798 | G4cout << "*****EXPMAX=0. Choose different E's or Temp" << G4endl; |
---|
799 | if(expmin == 0.) |
---|
800 | G4cout << "*****EXPMIN=0. Choose different E's or Temp" << G4endl; |
---|
801 | |
---|
802 | G4double tempvar = rndm *((-k)*Temp*(Emax*expmax - Emin*expmin) - |
---|
803 | (ksq*Tsq*(expmax-expmin))); |
---|
804 | |
---|
805 | G4double bigc = (tempvar - k*Temp*Emin*expmin - ksq*Tsq*expmin)/(-k*Temp); |
---|
806 | |
---|
807 | // This gives an equation of form: Ee(-E/kT) + kTe(-E/kT) - C =0 |
---|
808 | // Solve this iteratively, step from Emin to Emax in 1000 steps |
---|
809 | // and take the best solution. |
---|
810 | |
---|
811 | G4double erange = Emax - Emin; |
---|
812 | G4double steps = erange/1000.; |
---|
813 | G4int i; |
---|
814 | G4double etest, diff, err; |
---|
815 | |
---|
816 | err = 100000.; |
---|
817 | |
---|
818 | for(i=1; i<1000; i++) |
---|
819 | { |
---|
820 | etest = Emin + (i-1)*steps; |
---|
821 | |
---|
822 | diff = etest*(std::exp(-etest/(k*Temp))) + k*Temp*(std::exp(-etest/(k*Temp))) - bigc; |
---|
823 | |
---|
824 | if(diff < 0.) |
---|
825 | diff = -diff; |
---|
826 | |
---|
827 | if(diff < err) |
---|
828 | { |
---|
829 | err = diff; |
---|
830 | particle_energy = etest; |
---|
831 | } |
---|
832 | } |
---|
833 | if(verbosityLevel >= 1) |
---|
834 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
835 | } |
---|
836 | |
---|
837 | void G4SPSEneDistribution::GenerateBbodyEnergies() |
---|
838 | { |
---|
839 | // BBody_x holds Energies, and BBHist holds the cumulative histo. |
---|
840 | // binary search to find correct bin then lin interpolation. |
---|
841 | // Use the earlier defined histogram + RandGeneral method to generate |
---|
842 | // random numbers following the histos distribution. |
---|
843 | G4double rndm; |
---|
844 | G4int nabove, nbelow = 0, middle; |
---|
845 | nabove = 10001; |
---|
846 | rndm = eneRndm->GenRandEnergy(); |
---|
847 | |
---|
848 | // Binary search to find bin that rndm is in |
---|
849 | while(nabove-nbelow > 1) |
---|
850 | { |
---|
851 | middle = (nabove + nbelow)/2; |
---|
852 | if(rndm == BBHist[middle]) break; |
---|
853 | if(rndm < BBHist[middle]) nabove = middle; |
---|
854 | else nbelow = middle; |
---|
855 | } |
---|
856 | |
---|
857 | // Now interpolate in that bin to find the correct output value. |
---|
858 | G4double x1, x2, y1, y2, m, q; |
---|
859 | x1 = Bbody_x[nbelow]; |
---|
860 | x2 = Bbody_x[nbelow+1]; |
---|
861 | y1 = BBHist[nbelow]; |
---|
862 | y2 = BBHist[nbelow+1]; |
---|
863 | m = (y2-y1)/(x2-x1); |
---|
864 | q = y1 - m*x1; |
---|
865 | |
---|
866 | particle_energy = (rndm - q)/m; |
---|
867 | |
---|
868 | if(verbosityLevel >= 1) |
---|
869 | { |
---|
870 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
871 | } |
---|
872 | } |
---|
873 | |
---|
874 | void G4SPSEneDistribution::GenerateCdgEnergies() |
---|
875 | { |
---|
876 | // Gen random numbers, compare with values in cumhist |
---|
877 | // to find appropriate part of spectrum and then |
---|
878 | // generate energy in the usual inversion way. |
---|
879 | // G4double pfact[2] = {8.5, 112}; |
---|
880 | // G4double spind[2] = {1.4, 2.3}; |
---|
881 | // G4double ene_line[3] = {1., 18., 1E6}; |
---|
882 | G4double rndm, rndm2; |
---|
883 | G4double ene_line[3]; |
---|
884 | G4double omalpha[2]; |
---|
885 | if(Emin < 18*keV && Emax < 18*keV) |
---|
886 | { |
---|
887 | omalpha[0] = 1. - 1.4; |
---|
888 | ene_line[0] = Emin; |
---|
889 | ene_line[1] = Emax; |
---|
890 | } |
---|
891 | if(Emin < 18*keV && Emax > 18*keV) |
---|
892 | { |
---|
893 | omalpha[0] = 1. - 1.4; |
---|
894 | omalpha[1] = 1. - 2.3; |
---|
895 | ene_line[0] = Emin; |
---|
896 | ene_line[1] = 18.*keV; |
---|
897 | ene_line[2] = Emax; |
---|
898 | } |
---|
899 | if(Emin > 18*keV) |
---|
900 | { |
---|
901 | omalpha[0] = 1. - 2.3; |
---|
902 | ene_line[0] = Emin; |
---|
903 | ene_line[1] = Emax; |
---|
904 | } |
---|
905 | rndm = eneRndm->GenRandEnergy(); |
---|
906 | rndm2 = eneRndm->GenRandEnergy(); |
---|
907 | |
---|
908 | G4int i = 0; |
---|
909 | while( rndm >= CDGhist[i]) |
---|
910 | { |
---|
911 | i++; |
---|
912 | } |
---|
913 | // Generate final energy. |
---|
914 | particle_energy = (std::pow(ene_line[i-1],omalpha[i-1]) + (std::pow(ene_line[i],omalpha[i-1]) |
---|
915 | - std::pow(ene_line[i-1],omalpha[i-1]))*rndm2); |
---|
916 | particle_energy = std::pow(particle_energy,(1./omalpha[i-1])); |
---|
917 | |
---|
918 | if(verbosityLevel >= 1) |
---|
919 | G4cout << "Energy is " << particle_energy << G4endl; |
---|
920 | } |
---|
921 | |
---|
922 | void G4SPSEneDistribution::GenUserHistEnergies() |
---|
923 | { |
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924 | // Histograms are DIFFERENTIAL. |
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925 | // G4cout << "In GenUserHistEnergies " << G4endl; |
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926 | if(IPDFEnergyExist == false) |
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927 | { |
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928 | G4int ii; |
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929 | G4int maxbin = G4int(UDefEnergyH.GetVectorLength()); |
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930 | G4double bins[1024], vals[1024], sum; |
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931 | sum=0.; |
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932 | |
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933 | if((EnergySpec == false) && (particle_definition == NULL)) |
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934 | G4cout << "Error: particle definition is NULL" << G4endl; |
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935 | |
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936 | if(maxbin > 1024) |
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937 | { |
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938 | G4cout << "Maxbin > 1024" << G4endl; |
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939 | G4cout << "Setting maxbin to 1024, other bins are lost" << G4endl; |
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940 | } |
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941 | |
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942 | if(DiffSpec == false) |
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943 | G4cout << "Histograms are Differential!!! " << G4endl; |
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944 | else |
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945 | { |
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946 | bins[0] = UDefEnergyH.GetLowEdgeEnergy(size_t(0)); |
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947 | vals[0] = UDefEnergyH(size_t(0)); |
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948 | sum = vals[0]; |
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949 | for(ii=1;ii<maxbin;ii++) |
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950 | { |
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951 | bins[ii] = UDefEnergyH.GetLowEdgeEnergy(size_t(ii)); |
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952 | vals[ii] = UDefEnergyH(size_t(ii)) + vals[ii-1]; |
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953 | sum = sum + UDefEnergyH(size_t(ii)); |
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954 | } |
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955 | } |
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956 | |
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957 | if(EnergySpec == false) |
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958 | { |
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959 | G4double mass = particle_definition->GetPDGMass(); |
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960 | // multiply the function (vals) up by the bin width |
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961 | // to make the function counts/s (i.e. get rid of momentum |
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962 | // dependence). |
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963 | for(ii=1;ii<maxbin;ii++) |
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964 | { |
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965 | vals[ii] = vals[ii] * (bins[ii] - bins[ii-1]); |
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966 | } |
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967 | // Put energy bins into new histo, plus divide by energy bin width |
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968 | // to make evals counts/s/energy |
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969 | for(ii=0;ii<maxbin;ii++) |
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970 | { |
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971 | bins[ii] = std::sqrt((bins[ii]*bins[ii]) + (mass*mass)) - mass; //kinetic energy |
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972 | } |
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973 | for(ii=1;ii<maxbin;ii++) |
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974 | { |
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975 | vals[ii] = vals[ii]/(bins[ii] - bins[ii-1]); |
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976 | } |
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977 | sum = vals[maxbin-1]; |
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978 | vals[0] = 0.; |
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979 | } |
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980 | for(ii=0;ii<maxbin;ii++) |
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981 | { |
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982 | vals[ii] = vals[ii]/sum; |
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983 | IPDFEnergyH.InsertValues(bins[ii], vals[ii]); |
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984 | } |
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985 | |
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986 | // Make IPDFEnergyExist = true |
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987 | IPDFEnergyExist = true; |
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988 | if(verbosityLevel > 1) |
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989 | IPDFEnergyH.DumpValues(); |
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990 | } |
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991 | |
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992 | // IPDF has been create so carry on |
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993 | G4double rndm = eneRndm->GenRandEnergy(); |
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994 | particle_energy = IPDFEnergyH.GetEnergy(rndm); |
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995 | |
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996 | if(verbosityLevel >= 1) |
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997 | G4cout << "Energy is " << particle_energy << G4endl; |
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998 | } |
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999 | |
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1000 | void G4SPSEneDistribution::GenArbPointEnergies() |
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1001 | { |
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1002 | if(verbosityLevel > 0) |
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1003 | G4cout << "In GenArbPointEnergies" << G4endl; |
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1004 | G4double rndm; |
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1005 | rndm = eneRndm->GenRandEnergy(); |
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1006 | if(IntType != "Spline") |
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1007 | { |
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1008 | // IPDFArbEnergyH.DumpValues(); |
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1009 | // Find the Bin |
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1010 | // have x, y, no of points, and cumulative area distribution |
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1011 | G4int nabove, nbelow = 0, middle; |
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1012 | nabove = IPDFArbEnergyH.GetVectorLength(); |
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1013 | // G4cout << nabove << G4endl; |
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1014 | // Binary search to find bin that rndm is in |
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1015 | while(nabove-nbelow > 1) |
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1016 | { |
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1017 | middle = (nabove + nbelow)/2; |
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1018 | if(rndm == IPDFArbEnergyH(size_t(middle))) break; |
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1019 | if(rndm < IPDFArbEnergyH(size_t(middle))) nabove = middle; |
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1020 | else nbelow = middle; |
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1021 | } |
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1022 | if(IntType == "Lin") |
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1023 | { |
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1024 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
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1025 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
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1026 | grad = Arb_grad[nbelow+1]; |
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1027 | cept = Arb_cept[nbelow+1]; |
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1028 | // G4cout << rndm << " " << Emax << " " << Emin << " " << grad << " " << cept << G4endl; |
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1029 | GenerateLinearEnergies(true); |
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1030 | } |
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1031 | else if(IntType == "Log") |
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1032 | { |
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1033 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
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1034 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
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1035 | alpha = Arb_alpha[nbelow+1]; |
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1036 | // G4cout << rndm << " " << Emax << " " << Emin << " " << alpha << G4endl; |
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1037 | GeneratePowEnergies(true); |
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1038 | } |
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1039 | else if(IntType == "Exp") |
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1040 | { |
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1041 | Emax = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow+1)); |
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1042 | Emin = IPDFArbEnergyH.GetLowEdgeEnergy(size_t(nbelow)); |
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1043 | Ezero = Arb_ezero[nbelow+1]; |
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1044 | // G4cout << rndm << " " << Emax << " " << Emin << " " << Ezero << G4endl; |
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1045 | GenerateExpEnergies(true); |
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1046 | } |
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1047 | } |
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1048 | else if(IntType == "Spline") |
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1049 | { |
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1050 | if(verbosityLevel > 1) |
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1051 | G4cout << "IntType = Spline " << rndm << G4endl; |
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1052 | // in SplineInterpolation created SplineInt |
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1053 | // Now generate a random number put it into CubicSplineInterpolation |
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1054 | // and you should get out an energy!?! |
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1055 | particle_energy = -1e100; |
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1056 | while (particle_energy < Emin || particle_energy > Emax ) { |
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1057 | particle_energy = SplineInt->CubicSplineInterpolation(rndm); |
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1058 | rndm = eneRndm->GenRandEnergy(); |
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1059 | } |
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1060 | if(verbosityLevel >= 1) |
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1061 | G4cout << "Energy is " << particle_energy << G4endl; |
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1062 | } |
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1063 | else |
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1064 | G4cout << "Error: IntType unknown type" << G4endl; |
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1065 | } |
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1066 | |
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1067 | void G4SPSEneDistribution::GenEpnHistEnergies() |
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1068 | { |
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1069 | // G4cout << "In GenEpnHistEnergies " << Epnflag << G4endl; |
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1070 | |
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1071 | // Firstly convert to energy if not already done. |
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1072 | if(Epnflag == true) |
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1073 | // epnflag = true means spectrum is epn, false means e. |
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1074 | { |
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1075 | // convert to energy by multiplying by A number |
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1076 | ConvertEPNToEnergy(); |
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1077 | // EpnEnergyH will be replace by UDefEnergyH. |
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1078 | // UDefEnergyH.DumpValues(); |
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1079 | } |
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1080 | |
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1081 | // G4cout << "Creating IPDFEnergy if not already done so" << G4endl; |
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1082 | if(IPDFEnergyExist == false) |
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1083 | { |
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1084 | // IPDF has not been created, so create it |
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1085 | G4double bins[1024],vals[1024], sum; |
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1086 | G4int ii; |
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1087 | G4int maxbin = G4int(UDefEnergyH.GetVectorLength()); |
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1088 | bins[0] = UDefEnergyH.GetLowEdgeEnergy(size_t(0)); |
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1089 | vals[0] = UDefEnergyH(size_t(0)); |
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1090 | sum = vals[0]; |
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1091 | for(ii=1;ii<maxbin;ii++) |
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1092 | { |
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1093 | bins[ii] = UDefEnergyH.GetLowEdgeEnergy(size_t(ii)); |
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1094 | vals[ii] = UDefEnergyH(size_t(ii)) + vals[ii-1]; |
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1095 | sum = sum + UDefEnergyH(size_t(ii)); |
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1096 | } |
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1097 | |
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1098 | for(ii=0;ii<maxbin;ii++) |
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1099 | { |
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1100 | vals[ii] = vals[ii]/sum; |
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1101 | IPDFEnergyH.InsertValues(bins[ii], vals[ii]); |
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1102 | } |
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1103 | // Make IPDFEpnExist = true |
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1104 | IPDFEnergyExist = true; |
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1105 | } |
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1106 | // IPDFEnergyH.DumpValues(); |
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1107 | // IPDF has been create so carry on |
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1108 | G4double rndm = eneRndm->GenRandEnergy(); |
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1109 | particle_energy = IPDFEnergyH.GetEnergy(rndm); |
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1110 | |
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1111 | if(verbosityLevel >= 1) |
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1112 | G4cout << "Energy is " << particle_energy << G4endl; |
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1113 | } |
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1114 | |
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1115 | void G4SPSEneDistribution::ConvertEPNToEnergy() |
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1116 | { |
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1117 | // Use this before particle generation to convert the |
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1118 | // currently stored histogram from energy/nucleon |
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1119 | // to energy. |
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1120 | // G4cout << "In ConvertEpntoEnergy " << G4endl; |
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1121 | if(particle_definition==NULL) |
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1122 | G4cout << "Error: particle not defined" << G4endl; |
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1123 | else |
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1124 | { |
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1125 | // Need to multiply histogram by the number of nucleons. |
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1126 | // Baryon Number looks to hold the no. of nucleons. |
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1127 | G4int Bary = particle_definition->GetBaryonNumber(); |
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1128 | // G4cout << "Baryon No. " << Bary << G4endl; |
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1129 | // Change values in histogram, Read it out, delete it, re-create it |
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1130 | G4int count, maxcount; |
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1131 | maxcount = G4int(EpnEnergyH.GetVectorLength()); |
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1132 | // G4cout << maxcount << G4endl; |
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1133 | G4double ebins[1024],evals[1024]; |
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1134 | if(maxcount > 1024) |
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1135 | { |
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1136 | G4cout << "Histogram contains more than 1024 bins!" << G4endl; |
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1137 | G4cout << "Those above 1024 will be ignored" << G4endl; |
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1138 | maxcount = 1024; |
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1139 | } |
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1140 | for(count=0;count<maxcount;count++) |
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1141 | { |
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1142 | // Read out |
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1143 | ebins[count] = EpnEnergyH.GetLowEdgeEnergy(size_t(count)); |
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1144 | evals[count] = EpnEnergyH(size_t(count)); |
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1145 | } |
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1146 | |
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1147 | // Multiply the channels by the nucleon number to give energies |
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1148 | for(count=0;count<maxcount;count++) |
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1149 | { |
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1150 | ebins[count] = ebins[count] * Bary; |
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1151 | } |
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1152 | |
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1153 | // Set Emin and Emax |
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1154 | Emin = ebins[0]; |
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1155 | if (maxcount > 1) |
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1156 | Emax = ebins[maxcount-1]; |
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1157 | else |
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1158 | Emax = ebins[0]; |
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1159 | // Put energy bins into new histogram - UDefEnergyH. |
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1160 | for(count=0;count<maxcount;count++) |
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1161 | { |
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1162 | UDefEnergyH.InsertValues(ebins[count], evals[count]); |
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1163 | } |
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1164 | Epnflag = false; //so that you dont repeat this method. |
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1165 | } |
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1166 | } |
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1167 | |
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1168 | // |
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1169 | void G4SPSEneDistribution::ReSetHist(G4String atype) |
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1170 | { |
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1171 | if (atype == "energy"){ |
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1172 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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1173 | IPDFEnergyExist = false ; |
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1174 | Emin = 0.; |
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1175 | Emax = 1e30;} |
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1176 | else if ( atype == "arb"){ |
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1177 | ArbEnergyH =IPDFArbEnergyH = ZeroPhysVector ; |
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1178 | IPDFArbExist = false;} |
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1179 | else if ( atype == "epn"){ |
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1180 | UDefEnergyH = IPDFEnergyH = ZeroPhysVector ; |
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1181 | IPDFEnergyExist = false ; |
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1182 | EpnEnergyH = ZeroPhysVector ;} |
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1183 | else { |
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1184 | G4cout << "Error, histtype not accepted " << G4endl; |
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1185 | } |
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1186 | } |
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1187 | |
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1188 | G4double G4SPSEneDistribution::GenerateOne(G4ParticleDefinition* a) |
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1189 | { |
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1190 | particle_definition = a; |
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1191 | particle_energy = -1.; |
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1192 | while ( (EnergyDisType == "Arb")? (particle_energy < ArbEmin || particle_energy > ArbEmax) |
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1193 | : (particle_energy < Emin || particle_energy > Emax) ) { |
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1194 | if(EnergyDisType == "Mono") |
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1195 | GenerateMonoEnergetic(); |
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1196 | else if(EnergyDisType == "Lin") |
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1197 | GenerateLinearEnergies(); |
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1198 | else if(EnergyDisType == "Pow") |
---|
1199 | GeneratePowEnergies(); |
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1200 | else if(EnergyDisType == "Exp") |
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1201 | GenerateExpEnergies(); |
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1202 | else if(EnergyDisType == "Gauss") |
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1203 | GenerateGaussEnergies(); |
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1204 | else if(EnergyDisType == "Brem") |
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1205 | GenerateBremEnergies(); |
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1206 | else if(EnergyDisType == "Bbody") |
---|
1207 | GenerateBbodyEnergies(); |
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1208 | else if(EnergyDisType == "Cdg") |
---|
1209 | GenerateCdgEnergies(); |
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1210 | else if(EnergyDisType == "User") |
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1211 | GenUserHistEnergies(); |
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1212 | else if(EnergyDisType == "Arb") |
---|
1213 | GenArbPointEnergies(); |
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1214 | else if(EnergyDisType == "Epn") |
---|
1215 | GenEpnHistEnergies(); |
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1216 | else |
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1217 | G4cout << "Error: EnergyDisType has unusual value" << G4endl; |
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1218 | } |
---|
1219 | return particle_energy; |
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1220 | } |
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1221 | |
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1222 | |
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1223 | |
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1224 | |
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1225 | |
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1226 | |
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1227 | |
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1228 | |
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1229 | |
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